Ex 2.5, 2 Evaluate the following products without multiplying directly: 103 107 103 107 = (100 + 3) (100 + 7) Using Identity (x + a) (x + b) = x2 + (a + b)x + ab, where x = 100 , a = 3, b = 7, = (100)2 + (3 + 7) 100 + (3) (7) = 10000 + (10)(100) + 21 = 10000 + 1000 + 21 = 11021

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Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths and Science at Teachoo.

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